In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:

I wrote a library of bit-oriented routines for the SX -- in it you'll find functions that will reverse the bits in a byte and in a word.

[code]' Use: result = FLIP_BYTE aByte
' -- flips bits in byte end-to-end

FUNC FLIP_BYTE
  '{$IFUSED FLIP_BYTE}
  ASM
    MOV   __PARAM2, __PARAM1                    ' make copy to __PARAM2
    CLR   __PARAM3                              ' clear count

FB_Loop:
    RR    __PARAM2                              ' get bit from __PARAM2
    RL    __PARAM1                              ' move into __PARAM1
    INC   __PARAM3                              ' update count
    JNB   __PARAM3.3, @FB_Loop                  ' abort at 8
  ENDASM
  '{$ENDIF}
  ENDFUNC[/code]

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